The relationship between 5G technology and the Internet of Things is mutually complementary, and the two operate together. The normal operation of the Internet of Things cannot be separated from the support of the data network. In the 4G era, the development of the Internet of Things is limited to some extent, such as communication rate, communication security and network compatibility between various underlying devices. With the rapid development of 5G technology, the development of the Internet of Things has ushered in a new dawn. 5G network has the characteristics of fast speed, high security and high communication frequency, making 5G network a preferred way of information exchange of the Internet of Things, promoting more high-speed communication of the Internet of Things and further integration of terminals. Therefore, the implementation of 5G provides power for the development of the Internet of Things, and the stability of 5G technology is also tested during the application of the Internet of Things.